Fixed: Safari "can't paste" code triggered even for a content editable target.

These targets might be rare but could occur in some Cappuccino text editor widget, in which case our standard native paste handling from Safari should work fine.

AppKit/Platform/DOM/CPPlatformWindow+DOM.j

@@ -206,7 +206,20 @@ var resizeTimer = nil;
 
 #if PLATFORM(DOM)
 
-#define HAS_INPUT_OR_TEXTAREA_TARGET(aDOMEvent) (((aDOMEvent).target || (aDOMEvent).srcElement).nodeName.toUpperCase() == "INPUT" || ((aDOMEvent).target || (aDOMEvent).srcElement).nodeName.toUpperCase() == "TEXTAREA")
+var hasEditableTarget = function(aDOMEvent)
+{
+    var target = (aDOMEvent).target || (aDOMEvent).srcElement;
+
+    if (!target)
+        return NO;
+
+    if (target.contentEditable == "true")
+        return YES;
+
+    var nodeName = target.nodeName.toUpperCase();
+
+    return nodeName === "INPUT" || nodeName == "TEXTAREA";
+}
 
 @implementation CPPlatformWindow (DOM)
 
@@ -804,7 +817,7 @@ var resizeTimer = nil;
                 // sending a CPEvent.  Select our element to see if anything gets pasted in it.
                 if (characters === "v" && mayRequireDOMPasteboardElement)
                 {
-                    if (hasBugWhichPreventsNonEditablePaste && !HAS_INPUT_OR_TEXTAREA_TARGET(aDOMEvent))
+                    if (hasBugWhichPreventsNonEditablePaste && !hasEditableTarget(aDOMEvent))
                     {
                         // You can't paste from the system clipboard into a non-editable area in Safari, neither using native
                         // copy and paste nor our _DOMPasteboardElement hack. We will paste from the Cappuccino pasteboard only
@@ -812,8 +825,6 @@ var resizeTimer = nil;
 
                         StopDOMEventPropagation = NO;
                         isNativePasteEvent = NO;
-
-                        var pasteboard = [CPPasteboard generalPasteboard];
                     }
                     else if (supportsNativeCopyAndPaste)
                         isNativePasteEvent = YES;
@@ -999,7 +1010,7 @@ var resizeTimer = nil;
     // the browser might normally grey the option out.
 
     // Allow these fields to do their own thing.
-    if (HAS_INPUT_OR_TEXTAREA_TARGET(aDOMEvent))
+    if (hasEditableTarget(aDOMEvent))
         return true;
 
     var returnValue = YES;
@@ -1117,7 +1128,7 @@ Return true if the event may be a copy and paste event, but the target is not an
 */
 - (void)_requiresDOMPasteboardElement:(DOMEvent)aDOMEvent flags:(unsigned)modifierFlags
 {
-    return !HAS_INPUT_OR_TEXTAREA_TARGET(aDOMEvent) && (modifierFlags & CPPlatformActionKeyMask);
+    return !hasEditableTarget(aDOMEvent) && (modifierFlags & CPPlatformActionKeyMask);
 }
 
 - (void)_primeDOMPasteboardElement